/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 14:53:58,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 14:53:58,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 14:53:59,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 14:53:59,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 14:53:59,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 14:53:59,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 14:53:59,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 14:53:59,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 14:53:59,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 14:53:59,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 14:53:59,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 14:53:59,017 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 14:53:59,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 14:53:59,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 14:53:59,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 14:53:59,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 14:53:59,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 14:53:59,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 14:53:59,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 14:53:59,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 14:53:59,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 14:53:59,039 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 14:53:59,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 14:53:59,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 14:53:59,041 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 14:53:59,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 14:53:59,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 14:53:59,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 14:53:59,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 14:53:59,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 14:53:59,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 14:53:59,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 14:53:59,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 14:53:59,043 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 14:53:59,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 14:53:59,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 14:53:59,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 14:53:59,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 14:53:59,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 14:53:59,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:53:59,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 14:53:59,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 14:53:59,044 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 14:53:59,044 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 14:53:59,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 14:53:59,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 14:53:59,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 14:53:59,262 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 14:53:59,263 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 14:53:59,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2022-03-17 14:53:59,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a9e147ea/7635ae55ac2a4a74b37c01522cf22046/FLAG227984499 [2022-03-17 14:53:59,669 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 14:53:59,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2022-03-17 14:53:59,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a9e147ea/7635ae55ac2a4a74b37c01522cf22046/FLAG227984499 [2022-03-17 14:54:00,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a9e147ea/7635ae55ac2a4a74b37c01522cf22046 [2022-03-17 14:54:00,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 14:54:00,096 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 14:54:00,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 14:54:00,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 14:54:00,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 14:54:00,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@796d9963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00, skipping insertion in model container [2022-03-17 14:54:00,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 14:54:00,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 14:54:00,220 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i[849,862] [2022-03-17 14:54:00,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:54:00,238 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 14:54:00,246 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i[849,862] [2022-03-17 14:54:00,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:54:00,258 INFO L208 MainTranslator]: Completed translation [2022-03-17 14:54:00,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00 WrapperNode [2022-03-17 14:54:00,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 14:54:00,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 14:54:00,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 14:54:00,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 14:54:00,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 14:54:00,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 14:54:00,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 14:54:00,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 14:54:00,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:54:00,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:00,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 14:54:00,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 14:54:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 14:54:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 14:54:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 14:54:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 14:54:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 14:54:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 14:54:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 14:54:00,427 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 14:54:00,429 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 14:54:00,582 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 14:54:00,586 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 14:54:00,586 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 14:54:00,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:54:00 BoogieIcfgContainer [2022-03-17 14:54:00,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 14:54:00,588 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 14:54:00,588 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 14:54:00,605 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 14:54:00,608 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:54:00" (1/1) ... [2022-03-17 14:54:00,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:54:00 BasicIcfg [2022-03-17 14:54:00,627 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 14:54:00,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 14:54:00,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 14:54:00,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 14:54:00,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:54:00" (1/4) ... [2022-03-17 14:54:00,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb74b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:54:00, skipping insertion in model container [2022-03-17 14:54:00,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:00" (2/4) ... [2022-03-17 14:54:00,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb74b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:54:00, skipping insertion in model container [2022-03-17 14:54:00,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:54:00" (3/4) ... [2022-03-17 14:54:00,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb74b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:54:00, skipping insertion in model container [2022-03-17 14:54:00,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:54:00" (4/4) ... [2022-03-17 14:54:00,634 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2.iJordan [2022-03-17 14:54:00,637 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 14:54:00,638 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 14:54:00,681 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 14:54:00,689 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 14:54:00,689 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 14:54:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 14:54:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 14:54:00,705 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:00,706 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:00,706 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:00,709 INFO L85 PathProgramCache]: Analyzing trace with hash -742242332, now seen corresponding path program 1 times [2022-03-17 14:54:00,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:00,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250160423] [2022-03-17 14:54:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:00,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:00,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:54:00,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:00,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250160423] [2022-03-17 14:54:00,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250160423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:54:00,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:54:00,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 14:54:00,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540069944] [2022-03-17 14:54:00,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:54:00,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 14:54:00,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 14:54:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 14:54:00,920 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:00,950 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-03-17 14:54:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 14:54:00,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-17 14:54:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:00,957 INFO L225 Difference]: With dead ends: 24 [2022-03-17 14:54:00,957 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 14:54:00,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 14:54:00,962 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:54:00,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:54:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 14:54:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-17 14:54:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-17 14:54:00,986 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-03-17 14:54:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:00,986 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-17 14:54:00,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-17 14:54:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 14:54:00,987 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:00,988 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:00,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 14:54:00,989 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1029197154, now seen corresponding path program 1 times [2022-03-17 14:54:00,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:00,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060915746] [2022-03-17 14:54:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:00,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:01,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:54:01,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060915746] [2022-03-17 14:54:01,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060915746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:54:01,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:54:01,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 14:54:01,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902105215] [2022-03-17 14:54:01,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:54:01,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 14:54:01,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 14:54:01,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 14:54:01,076 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:01,125 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-03-17 14:54:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 14:54:01,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-17 14:54:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:01,127 INFO L225 Difference]: With dead ends: 21 [2022-03-17 14:54:01,127 INFO L226 Difference]: Without dead ends: 21 [2022-03-17 14:54:01,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 14:54:01,131 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:54:01,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:54:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-17 14:54:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-03-17 14:54:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-03-17 14:54:01,138 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-03-17 14:54:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:01,139 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-03-17 14:54:01,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-03-17 14:54:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 14:54:01,146 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:01,146 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:01,146 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 14:54:01,146 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash 559300038, now seen corresponding path program 1 times [2022-03-17 14:54:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:01,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016380184] [2022-03-17 14:54:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:01,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:01,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 14:54:01,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:01,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016380184] [2022-03-17 14:54:01,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016380184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:01,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625366582] [2022-03-17 14:54:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:01,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:01,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:01,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:54:01,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 14:54:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 14:54:01,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:54:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 14:54:01,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:54:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 14:54:01,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625366582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:54:01,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:54:01,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 14:54:01,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491676246] [2022-03-17 14:54:01,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:54:01,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 14:54:01,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:01,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 14:54:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 14:54:01,378 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:01,445 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-03-17 14:54:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 14:54:01,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-17 14:54:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:01,446 INFO L225 Difference]: With dead ends: 31 [2022-03-17 14:54:01,446 INFO L226 Difference]: Without dead ends: 31 [2022-03-17 14:54:01,447 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-17 14:54:01,447 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:54:01,448 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 26 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:54:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-17 14:54:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-17 14:54:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-17 14:54:01,451 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 18 [2022-03-17 14:54:01,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:01,451 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-17 14:54:01,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-17 14:54:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 14:54:01,451 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:01,452 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:01,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 14:54:01,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:01,672 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:01,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:01,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1216277774, now seen corresponding path program 2 times [2022-03-17 14:54:01,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:01,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335855845] [2022-03-17 14:54:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:01,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:54:01,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:01,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335855845] [2022-03-17 14:54:01,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335855845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:01,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690439240] [2022-03-17 14:54:01,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 14:54:01,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:01,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:01,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:54:01,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 14:54:01,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 14:54:01,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:54:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 14:54:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:54:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:54:01,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:54:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:54:02,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690439240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:54:02,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:54:02,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-17 14:54:02,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99399974] [2022-03-17 14:54:02,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:54:02,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 14:54:02,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 14:54:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-17 14:54:02,068 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:02,256 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-03-17 14:54:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 14:54:02,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-17 14:54:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:02,257 INFO L225 Difference]: With dead ends: 55 [2022-03-17 14:54:02,257 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 14:54:02,258 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-03-17 14:54:02,258 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:54:02,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 26 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:54:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 14:54:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-17 14:54:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-03-17 14:54:02,276 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 30 [2022-03-17 14:54:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:02,276 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-03-17 14:54:02,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-03-17 14:54:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 14:54:02,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:02,278 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:02,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 14:54:02,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 14:54:02,482 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:02,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1982943050, now seen corresponding path program 3 times [2022-03-17 14:54:02,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:02,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646495336] [2022-03-17 14:54:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:02,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:02,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-17 14:54:02,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:02,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646495336] [2022-03-17 14:54:02,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646495336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:02,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633060701] [2022-03-17 14:54:02,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 14:54:02,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:02,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:02,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:54:02,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 14:54:04,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-17 14:54:04,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:54:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 14:54:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:54:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-17 14:54:04,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:54:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-17 14:54:04,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633060701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:54:04,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:54:04,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-17 14:54:04,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423727301] [2022-03-17 14:54:04,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:54:04,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 14:54:04,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:04,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 14:54:04,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-17 14:54:04,749 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:05,192 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2022-03-17 14:54:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 14:54:05,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-17 14:54:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:05,194 INFO L225 Difference]: With dead ends: 103 [2022-03-17 14:54:05,194 INFO L226 Difference]: Without dead ends: 103 [2022-03-17 14:54:05,195 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-03-17 14:54:05,195 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 143 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:54:05,195 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 26 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:54:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-17 14:54:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-17 14:54:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:05,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-03-17 14:54:05,202 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 54 [2022-03-17 14:54:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:05,202 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-03-17 14:54:05,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-03-17 14:54:05,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-17 14:54:05,204 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:05,204 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:05,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 14:54:05,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:05,415 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash 951586810, now seen corresponding path program 4 times [2022-03-17 14:54:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:05,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071870232] [2022-03-17 14:54:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:05,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-17 14:54:05,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071870232] [2022-03-17 14:54:05,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071870232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:05,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541331319] [2022-03-17 14:54:05,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 14:54:05,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:05,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:05,816 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:54:05,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 14:54:05,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 14:54:05,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:54:05,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-17 14:54:05,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:54:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-17 14:54:06,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:54:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-17 14:54:06,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541331319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:54:06,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:54:06,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-17 14:54:06,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995153150] [2022-03-17 14:54:06,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:54:06,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-17 14:54:06,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:06,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-17 14:54:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-17 14:54:06,793 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:07,901 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2022-03-17 14:54:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-17 14:54:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-17 14:54:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:07,903 INFO L225 Difference]: With dead ends: 199 [2022-03-17 14:54:07,903 INFO L226 Difference]: Without dead ends: 199 [2022-03-17 14:54:07,905 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-03-17 14:54:07,907 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 286 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 14:54:07,907 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 46 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 14:54:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-17 14:54:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-03-17 14:54:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-03-17 14:54:07,929 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 102 [2022-03-17 14:54:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:07,929 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-03-17 14:54:07,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-03-17 14:54:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-17 14:54:07,931 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:07,931 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:07,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 14:54:08,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:08,132 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:08,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1740721830, now seen corresponding path program 5 times [2022-03-17 14:54:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:08,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414931440] [2022-03-17 14:54:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:08,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:09,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-17 14:54:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:09,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414931440] [2022-03-17 14:54:09,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414931440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:09,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240966545] [2022-03-17 14:54:09,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 14:54:09,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:09,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:09,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:54:09,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process